System for molding a synthetic-resin using plastic scrap

Details System for molding a synthetic-resin using plastic scrap System for molding a synthetic-resin using plastic scrap

1992-04-08

1993-10-19

Heitbrink, Jill L.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

26432817, 425197, 425205, 425587, 366 87, 366 91, B29C 4546

Patent

active

052539946

ABSTRACT:
A synthetic-resin article is molded by plastifying a virgin granulate into a fluent stream and plastifying a recycle granulate into another fluent stream. The recycle stream is then filtered while still plastified to removing particulate impurities from it. Then the filtered recycle stream while still plastified is combined with the virgin stream to form a combined stream and the combined stream is fed into a mold. The stream is mechanically filtered.

REFERENCES:
patent: 2838801 (1958-06-01), De Long et al.
patent: 4005167 (1977-01-01), Stern
patent: 4177234 (1979-12-01), Lowry
patent: 4591467 (1986-05-01), Kopernicky
"Extruder" Abstract, vol. 14 No. 46 (M-926) (3989) Jan. 29, 1990.
"Kaskaden-Extrusionssysteme Verbessern den Extrusionsprozess" F. Hensen et al, Kunststoffe 80 (1990) 6 pags. 673-678.
U. Neumann et al. "Verschiedenartige `Abfalle . . . `", PLASTverarbeiter, 1984, No. 4.
H. Langhorst, "Wiederverwerten von Thermoplastischen Kunststoffabfallen . . . ", Kunststoffberater--1989, No. 3.

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